| (19) |
 |
|
(11) |
EP 0 291 198 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
28.03.1990 Bulletin 1990/13 |
| (43) |
Date of publication A2: |
|
17.11.1988 Bulletin 1988/46 |
| (22) |
Date of filing: 27.04.1988 |
|
| (51) |
International Patent Classification (IPC)4: C11D 17/04 |
|
| (84) |
Designated Contracting States: |
|
BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
14.05.1987 US 50260
31.03.1988 US 175778
|
| (71) |
Applicant: The Clorox Company |
|
Oakland
California 94612 (US) |
|
| (72) |
Inventors: |
|
- Yang, Chihae, (NMI)
Pleasanton
California 94566 (US)
- Kaufmann, Edward J.
San Ramon
California 94583 (US)
|
| (74) |
Representative: Froud, Clive et al |
|
Elkington and Fife
Prospect House
8 Pembroke Road
Sevenoaks, Kent TN13 1XR
Sevenoaks, Kent TN13 1XR (GB) |
|
| |
|
| (54) |
Films from PVA modified with nonhydrolyzable anionic comonomers containing additives |
(57) A PVA film modified with anionic comonomers is provided for use as a water-soluble
seal or pouch for alkaline or borate-containing cleaning compositions. The films comprise
copolymers of 90-100% hydrolyzed vinyl alcohol with a nonhydrolyzable anionic comonomer,
and have molecular weights characterized by a viscosity range of 4-35 cPs. The films
are resistant to insolubilization caused by alkaline or borate-containing additives,
are storage stable over a wide range of temperature and humidity storage conditions,
rapidly and fully solubilize in a wash solution, and do not significantly impair cleaning
performance of an additive enclosed within.